Regulator for dynamo - electric machines



(No Model.)

T. A. EDISON.

REGULATOR FOR DYNAMO ELEGTRIG MACHINES.

No. 273,487., Patented Ma.1-.6,1883.

INVENTOR WITNESSES N. #21 ans. Pnmo-limc npw, Wnhinyun. a. c.

UNITED STATES PATENT OFFICE.

THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY.

REGULATOR FOR DYhlAlVlO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 273,487, dated March 6, 1883.

Application filed September 22, 1882. (No model.)

' ple and eificient means for automatically regulating the generative capacity ot a dynamo or magneto electric machine which will regulate both for changes in the number of translating devices and in the speed of the engine. This I accomplish by taking from the commutatorcylinder of the machine a separate currentfor the field-of-force circuit by means of one or more extra commutator-brushes adjusted by mechanism operated or controlled by an electro-magnetplaced in a multiple-arc circuit from the main conductors, so as to be affected exactly as are the lamps.

The arrangement forobtaining the separate current at the commutator-cylinder may be any one of those described in a previous application for patent tiled by me, (Serial No. 68,628,) the extra brush or brushes being adjusted by a double pawl-and-ratchet vibrating mechanism controlled by the electro-magnct in multiple arc.

The foregoing will be better understood from the drawing, which is a view, partly diagrammatic, of apparatus embodying the invention.

A is a dynamo or magneto electric machine, from the main commutator-brushes a b of which run the main conductors l 2. These main brushes are supported in any usual or suitable way, the drawing showing them diagram matically t'or clearness of illustration.

Thelamps or other translating devices B are located in multiple-arc circuits 3 L from 1 2.

Two extra brushes, 0 d, hearing on the commutator-cylinder, are mounted noon a yoke, e, pivoted on the armature-shaft. The field-offorce circuit 5 6 of the machine is taken from these brushes 0 cl. The yoke c has secured to ita cog-wheel,f, with which meshes a cogwheel, g, keyed to the same spindle, with two oppositely-turned ratchet-wheels, one of which is shown at h. With these ratchet-wheels engage two pawls, t 70, carried by the armaturelevers lot of electro-magnets U D, the levers being retracted by springs. The circuit of these electromagnets may be a circuit derived in any suitable way from the conductors supplietl by the machine. It is shown as a multiple-arc circuit, 7 8, from the main conductors l 2. This circuit passes through the armaturelever n of an electro-maguet, E, the circuit being divided at the front and back contacts, 0

p, ot'this lever, and the magnets O D being located in the separate divisions of the circuit. The circuit 7 8 also passes through a circuitbreaker,which may be a circuit-breaking wheel,

q, driven by the armature-shalt r, or any other moving part. The spring-fingers s 17 rest on the breaking-hub of this wheel, and the circuit-connections are made with these springlingers. The clectro-magnet E is located in a multiple-arc circuit, 9 10, from 1 2. Its armature-levernis retracted by an adjustable spring, u, and is held at a central point intermediate between its contact-points by spring fingers 11. 'When the currentincreases to a definite extent the lever of E will make its front contact, completing circuit through D, and causing its lever to vibrate with the assistance of the circuit-breaker. This movement will turn the yoke c and throw the brushes 0 d on the commutator-cylinder away from the line of greatest generation. When the candle-power ofthe lamps becomes normal the lever n will resume a central position, breaking the circuit 7 8.

Upon a definite decrease of current the lever n will makeits back contact, energizing U and throwing the brushes 0 01 toward the line of greatest generation. The brushes 0 d may work upon a difi'erent portion of the commu tater-cylinder from the main brushes, so that a ceases field-wire, While the other end of the field-wire Will be connected with a main brush; or two extra brushes forming one pole may be used, a main brush forming the other pole, as described in my application Serial No. 68,626. The adjustment of the extra brush or brushes by the mechanism before described will effect the regulation of the machine.

What I claim is-- 1. The combination, with a dynamo or magneto electric machine having the current for its field-circuit taken from its commutator-cylinder by means of an extra brush or brushes, of means for automatically adjusting said extra brush or brushes to effect the regulation of the machine, substantially as set forth.

2. The combination, with a dynamo or map;- neto electric machine supplying translating devices in multiple arc, and having the current for its tield-of-force circuit talren from. the commutator-cylinder by means of an extra brush or brushes, of mechanism for adjusting such extra brush or brushes, and an electro-magnet located in a multiple-arc circuit and operating or controlling the operation of said adjusting mechanism substantially as set forth.

3. The combination, With a dynamo or magneto electric machine supplying translatiu g devices in multiple 'arc, and having the current for its field-circuit taken from its commutatorcylinder by an extra brush or brushes,of mechanism for adjusting such extra brush or brushes, and an electro-magnet located in a niultiple-arccircuit,thearn'iature-leverot'which completes at its front and back contacts sepa rate circuits through the adjusting mechanism, causing it to move in opposite directions, substantially as set forth.

4t. The combination, with a dynamo or magneto electric machine supplying translating devices in multiple arc, and having the current for its field-circuit taken from its commutatorcyliuder by an extra brush or brushes, of two electro-magnets working oppositely, moving pawls and ratchets, a circuit-breaker in the circuit of said magnets, and an electro-inae'net in multiple are completing the circuits of said first magnets at its contacts, substantially as set forth.

This specification signed and witnessed this 12th day of September, 1882.

THOS. A. EDISON.

Witnesses:

W M. A. STERN, H. W. SEELY. 

